Question

我有两个带有文本框和标签的面板。我正在尝试使用panel1.texbox1 * panel2.textbox1 + panel1.textbox2 ...等等。但是当我运行程序时，它实际上显示了我所有文本框的产品。

这里我有创建文本框和标签的代码：

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    int j,c=1;
    int i = comboBox1.SelectedIndex;
    if (i != null)
    {
        for (j = 0; j <= i; j++)
        {
            Label label = new Label();

            label.Text = "w" + c;
            label.Location = new System.Drawing.Point(5, 20 + (20 * c));
            label.Size = new System.Drawing.Size(30, 20);
            panel1.Controls.Add(label);
            Label label2 = new Label();
            label2.Text = "x" + c;
            label2.Location = new System.Drawing.Point(5, 20 + (20 * c));
            label2.Size = new System.Drawing.Size(30, 20);
            panel3.Controls.Add(label2);
            TextBox w = new TextBox();
            w.Text = "";
            w.Location = new System.Drawing.Point(35, 20 + (20 * c));
            w.Size = new System.Drawing.Size(25, 20);
            panel1.Controls.Add(w);

            TextBox x = new TextBox();
            x.Text = "";
            x.Location = new System.Drawing.Point(35, 20 + (20 * c));
            x.Size = new System.Drawing.Size(25, 20);
            panel3.Controls.Add(x);

            c++;
        }
    }
}

以下是我尝试使用的代码：

private void button4_Click(object sender, EventArgs e)
{
    int suma = 0;
    foreach (Control w1 in panel1.Controls.OfType<TextBox>())
    {                            
        foreach (Control w2 in panel3.Controls.OfType<TextBox>())
        {
            int textB1 = int.Parse(w1.Text);
            int textB2 = int.Parse(w2.Text);
            int textB3 = textB1 * textB2;
        }       
    }
    textBox3.Text = "" + suma;  
}

Answer 1

我还没有测试过代码，但这应该可以完成工作：

请注意，此代码不安全，您可能需要添加一些空值检查以使代码更具弹性

400ms

祝你好运！

Answer 2

在您当前的代码中，您将所有控件（包括标签）转换为文本框，方法是对其进行public void pushTransferToStatus(Long id, Status status) { // SOME PRECONDITIONS switch (currentStatus) { case OPEN: // DO SOMETHING break; case SAVED: // DO SOMETHING ASYNC break; case VALIDATED: // DO SOMETHING break; case AWAITING_SHIPPING: // DO SOMETHING break; case VERIFIED: // DO SOMETHING break; case CLOSED: // Exit case. break; default: throw new UnsupportedOperationException(); } pushTransferToStatus(id, newStatus); }，因为集合中还包含标签。
以下是我认为你应该做的事情：

OfType<TextBox>()

Answer 3

您可以使用linq在一行中执行此操作，但您当然必须先在文本框中检查有效输入：

  var panel1Texts = panel1.Controls.OfType<TextBox>().ToArray();
  var panel2Texts = panel2.Controls.OfType<TextBox>().ToArray();

  Func<TextBox, bool> isInvalid = (text) =>
  {
    int res;
    return !int.TryParse(text.Text, out res);
  };

  var errorText = panel1Texts.FirstOrDefault(isInvalid);
  if (errorText != null)
  {
    // Error handling
  }

  errorText = panel2Texts.FirstOrDefault(isInvalid);
  if (errorText != null)
  {
    // Error handling
  }

  var sum = panel1Texts.Zip(panel2Texts, (tb1, tb2) => int.Parse(tb1.Text) * int.Parse(tb2.Text)).Sum();

textBox3.Text = sum.ToString();

Forebox文本框总和c＃

3 个答案: